Show fork information on the project panel

app/views/projects/_home_panel.html.haml

 - empty_repo = @project.empty_repo?
+- fork_network = @project.fork_network
+- forked_from_project = @project.forked_from_project || fork_network&.root_project
 .project-home-panel.text-center{ class: ("empty-project" if empty_repo) }
   .limit-container-width{ class: container_class }
     .avatar-container.s70.project-avatar
@@ -12,11 +14,16 @@
       - if @project.description.present?
         = markdown_field(@project, :description)
 
-      - if forked_from_project = @project.forked_from_project
+      - if @project.forked?
         %p
+          - if forked_from_project
             #{ s_('ForkedFromProjectPath|Forked from') }
             = link_to project_path(forked_from_project) do
-            = forked_from_project.namespace.try(:name)
+              = forked_from_project.full_name
+          - else
+            - deleted_message = s_('ForkedFromProjectPath|Forked from %{project_name} (deleted)')
+            = deleted_message % { project_name: fork_network.deleted_root_project_name }
+
       - if @project.mirror?
         - import_url = @project.safe_import_url
         %p

locale/gitlab.pot

@@ -8,8 +8,8 @@ msgid ""
 msgstr ""
 "Project-Id-Version: gitlab 1.0.0\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2017-10-04 17:48+0100\n"
-"PO-Revision-Date: 2017-10-04 17:48+0100\n"
+"POT-Creation-Date: 2017-10-06 22:39+0200\n"
+"PO-Revision-Date: 2017-10-06 22:39+0200\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
 "Language: \n"
@@ -439,6 +439,9 @@ msgstr ""
 msgid "CiStatus|running"
 msgstr ""
 
+msgid "Clone repository"
+msgstr ""
+
 msgid "Close"
 msgstr ""
 
@@ -700,6 +703,9 @@ msgstr[1] ""
 msgid "ForkedFromProjectPath|Forked from"
 msgstr ""
 
+msgid "ForkedFromProjectPath|Forked from %{project_name} (deleted)"
+msgstr ""
+
 msgid "Format"
 msgstr ""
 
@@ -796,6 +802,11 @@ msgstr ""
 msgid "Install a Runner compatible with GitLab CI"
 msgstr ""
 
+msgid "Instance"
+msgid_plural "Instances"
+msgstr[0] ""
+msgstr[1] ""
+
 msgid "Interval Pattern"
 msgstr ""
 
@@ -878,6 +889,12 @@ msgid_plural "Limited to showing %d events at most"
 msgstr[0] ""
 msgstr[1] ""
 
+msgid "Lock"
+msgstr ""
+
+msgid "Locked"
+msgstr ""
+
 msgid "Locked Files"
 msgstr ""
 
@@ -1018,9 +1035,15 @@ msgstr ""
 msgid "OfSearchInADropdown|Filter"
 msgstr ""
 
+msgid "Only project members can comment."
+msgstr ""
+
 msgid "OpenedNDaysAgo|Opened"
 msgstr ""
 
+msgid "Opens in a new window"
+msgstr ""
+
 msgid "Options"
 msgstr ""
 
@@ -1045,6 +1068,9 @@ msgstr ""
 msgid "Password"
 msgstr ""
 
+msgid "People without permission will never get a notification and won\\'t be able to comment."
+msgstr ""
+
 msgid "Pipeline"
 msgstr ""
 
@@ -1371,6 +1397,9 @@ msgstr[1] ""
 msgid "Snippets"
 msgstr ""
 
+msgid "Something went wrong trying to change the locked state of this ${this.issuableDisplayName(this.issuableType)}"
+msgstr ""
+
 msgid "SortOptions|Access level, ascending"
 msgstr ""
 
@@ -1565,12 +1594,24 @@ msgstr ""
 msgid "There are problems accessing Git storage: "
 msgstr ""
 
+msgid "This is a confidential issue."
+msgstr ""
+
 msgid "This is the author's first Merge Request to this project."
 msgstr ""
 
+msgid "This issue is confidential and locked."
+msgstr ""
+
+msgid "This issue is locked."
+msgstr ""
+
 msgid "This means you can not push code until you create an empty repository or import existing one."
 msgstr ""
 
+msgid "This merge request is locked."
+msgstr ""
+
 msgid "Time before an issue gets scheduled"
 msgstr ""
 
@@ -1649,9 +1690,6 @@ msgstr ""
 msgid "Timeago|a week ago"
 msgstr ""
 
-msgid "Timeago|a while"
-msgstr ""
-
 msgid "Timeago|a year ago"
 msgstr ""
 
@@ -1703,6 +1741,9 @@ msgstr ""
 msgid "Timeago|in 1 year"
 msgstr ""
 
+msgid "Timeago|in a while"
+msgstr ""
+
 msgid "Timeago|less than a minute ago"
 msgstr ""
 
@@ -1728,6 +1769,12 @@ msgstr ""
 msgid "Track activity with Contribution Analytics."
 msgstr ""
 
+msgid "Unlock"
+msgstr ""
+
+msgid "Unlocked"
+msgstr ""
+
 msgid "Unstar"
 msgstr ""
 
@@ -1896,6 +1943,9 @@ msgstr ""
 msgid "Wiki|Wiki Pages"
 msgstr ""
 
+msgid "With contribution analytics you can have an overview for the activity of issues, merge requests and push events of your organization and its members."
+msgstr ""
+
 msgid "Withdraw Access Request"
 msgstr ""
 
@@ -1944,6 +1994,9 @@ msgstr ""
 msgid "You won't be able to pull or push project code via SSH until you %{add_ssh_key_link} to your profile"
 msgstr ""
 
+msgid "Your comment will not be visible to the public."
+msgstr ""
+
 msgid "Your name"
 msgstr ""
 

spec/features/projects_spec.rb

@@ -77,6 +77,55 @@ feature 'Project' do
     end
   end
 
+  describe 'showing information about source of a project fork' do
+    let(:user) { create(:user) }
+    let(:base_project)  { create(:project, :public, :repository) }
+    let(:forked_project) { fork_project(base_project, user, repository: true) }
+
+    before do
+      sign_in user
+    end
+
+    it 'shows a link to the source project when it is available' do
+      visit project_path(forked_project)
+
+      expect(page).to have_content('Forked from')
+      expect(page).to have_link(base_project.full_name)
+    end
+
+    it 'does not contain fork network information for the root project' do
+      forked_project
+
+      visit project_path(base_project)
+
+      expect(page).not_to have_content('In fork network of')
+      expect(page).not_to have_content('Forked from')
+    end
+
+    it 'shows the name of the deleted project when the source was deleted' do
+      forked_project
+      Projects::DestroyService.new(base_project, base_project.owner).execute
+
+      visit project_path(forked_project)
+
+      expect(page).to have_content("Forked from #{base_project.full_name} (deleted)")
+    end
+
+    context 'a fork of a fork' do
+      let(:fork_of_fork) { fork_project(forked_project, user, repository: true) }
+
+      it 'links to the base project if the source project is removed' do
+        fork_of_fork
+        Projects::DestroyService.new(forked_project, user).execute
+
+        visit project_path(fork_of_fork)
+
+        expect(page).to have_content("Forked from")
+        expect(page).to have_link(base_project.full_name)
+      end
+    end
+  end
+
   describe 'removal', js: true do
     let(:user)    { create(:user, username: 'test', name: 'test') }
     let(:project) { create(:project, namespace: user.namespace, name: 'project1') }